Comment 38 for bug 290867

With 16 votes this seems to be the main page for this problem. The following appear to be duplicates of this bug, Bug 416747, Bug 256039, Bug 253487, Bug 204328.

In Firefox 3.0 the only way I could workaround it for my local file application was to use javascript to set navigator.preference("dom.disable_open_during_load", false) (Block/Unblock popups), then open the popup, and then reset the pref to what it was originally. This is a messy solution though since you also need to set user_pref("security.fileuri.strict_origin_policy", false) plus set privileges (UniversalPreferencesWrite/Read)and you get a security prompt.

I hope somebody can solve this since it will mess up many local applications. I lost ages on it trying to figure out what was wrong before finding it was a bug. Thought maybe I had to use user_pref("capability.policy.localfile.Window.open", "allAccess") but that was a dead end since it is always overridden by dom.disable_open_during_load.